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87ecb68b PB |
1 | #ifndef QEMU_TIMER_H |
2 | #define QEMU_TIMER_H | |
3 | ||
29e922b6 | 4 | #include "qemu-common.h" |
c57c846a BS |
5 | #include <time.h> |
6 | #include <sys/time.h> | |
7 | ||
8 | #ifdef _WIN32 | |
9 | #include <windows.h> | |
10 | #include <mmsystem.h> | |
11 | #endif | |
29e922b6 | 12 | |
87ecb68b PB |
13 | /* timers */ |
14 | ||
0ce1b948 PB |
15 | #define SCALE_MS 1000000 |
16 | #define SCALE_US 1000 | |
17 | #define SCALE_NS 1 | |
18 | ||
87ecb68b PB |
19 | typedef struct QEMUClock QEMUClock; |
20 | typedef void QEMUTimerCB(void *opaque); | |
21 | ||
22 | /* The real time clock should be used only for stuff which does not | |
23 | change the virtual machine state, as it is run even if the virtual | |
24 | machine is stopped. The real time clock has a frequency of 1000 | |
25 | Hz. */ | |
26 | extern QEMUClock *rt_clock; | |
27 | ||
28 | /* The virtual clock is only run during the emulation. It is stopped | |
29 | when the virtual machine is stopped. Virtual timers use a high | |
30 | precision clock, usually cpu cycles (use ticks_per_sec). */ | |
31 | extern QEMUClock *vm_clock; | |
32 | ||
21d5d12b JK |
33 | /* The host clock should be use for device models that emulate accurate |
34 | real time sources. It will continue to run when the virtual machine | |
35 | is suspended, and it will reflect system time changes the host may | |
36 | undergo (e.g. due to NTP). The host clock has the same precision as | |
37 | the virtual clock. */ | |
38 | extern QEMUClock *host_clock; | |
39 | ||
41c872b6 | 40 | int64_t qemu_get_clock_ns(QEMUClock *clock); |
db1a4972 | 41 | void qemu_clock_enable(QEMUClock *clock, int enabled); |
ab33fcda | 42 | void qemu_clock_warp(QEMUClock *clock); |
87ecb68b | 43 | |
4a998740 PB |
44 | QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale, |
45 | QEMUTimerCB *cb, void *opaque); | |
87ecb68b PB |
46 | void qemu_free_timer(QEMUTimer *ts); |
47 | void qemu_del_timer(QEMUTimer *ts); | |
48 | void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time); | |
49 | int qemu_timer_pending(QEMUTimer *ts); | |
2430ffe4 | 50 | int qemu_timer_expired(QEMUTimer *timer_head, int64_t current_time); |
87ecb68b | 51 | |
db1a4972 PB |
52 | void qemu_run_all_timers(void); |
53 | int qemu_alarm_pending(void); | |
cb842c90 | 54 | int64_t qemu_next_icount_deadline(void); |
db1a4972 PB |
55 | void configure_alarms(char const *opt); |
56 | void configure_icount(const char *option); | |
57 | int qemu_calculate_timeout(void); | |
58 | void init_clocks(void); | |
59 | int init_timer_alarm(void); | |
60 | void quit_timers(void); | |
61 | ||
70c3b557 BS |
62 | int64_t cpu_get_ticks(void); |
63 | void cpu_enable_ticks(void); | |
64 | void cpu_disable_ticks(void); | |
65 | ||
0ce1b948 PB |
66 | static inline QEMUTimer *qemu_new_timer_ns(QEMUClock *clock, QEMUTimerCB *cb, |
67 | void *opaque) | |
68 | { | |
4a998740 | 69 | return qemu_new_timer(clock, SCALE_NS, cb, opaque); |
0ce1b948 PB |
70 | } |
71 | ||
72 | static inline QEMUTimer *qemu_new_timer_ms(QEMUClock *clock, QEMUTimerCB *cb, | |
73 | void *opaque) | |
74 | { | |
4a998740 | 75 | return qemu_new_timer(clock, SCALE_MS, cb, opaque); |
0ce1b948 PB |
76 | } |
77 | ||
78 | static inline int64_t qemu_get_clock_ms(QEMUClock *clock) | |
79 | { | |
80 | return qemu_get_clock_ns(clock) / SCALE_MS; | |
81 | } | |
82 | ||
274dfed8 AL |
83 | static inline int64_t get_ticks_per_sec(void) |
84 | { | |
85 | return 1000000000LL; | |
86 | } | |
87ecb68b | 87 | |
c57c846a BS |
88 | /* real time host monotonic timer */ |
89 | static inline int64_t get_clock_realtime(void) | |
90 | { | |
91 | struct timeval tv; | |
92 | ||
93 | gettimeofday(&tv, NULL); | |
94 | return tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000); | |
95 | } | |
96 | ||
97 | /* Warning: don't insert tracepoints into these functions, they are | |
98 | also used by simpletrace backend and tracepoints would cause | |
99 | an infinite recursion! */ | |
100 | #ifdef _WIN32 | |
101 | extern int64_t clock_freq; | |
102 | ||
103 | static inline int64_t get_clock(void) | |
104 | { | |
105 | LARGE_INTEGER ti; | |
106 | QueryPerformanceCounter(&ti); | |
107 | return muldiv64(ti.QuadPart, get_ticks_per_sec(), clock_freq); | |
108 | } | |
109 | ||
110 | #else | |
111 | ||
112 | extern int use_rt_clock; | |
113 | ||
114 | static inline int64_t get_clock(void) | |
115 | { | |
116 | #if defined(__linux__) || (defined(__FreeBSD__) && __FreeBSD_version >= 500000) \ | |
117 | || defined(__DragonFly__) || defined(__FreeBSD_kernel__) | |
118 | if (use_rt_clock) { | |
119 | struct timespec ts; | |
120 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
121 | return ts.tv_sec * 1000000000LL + ts.tv_nsec; | |
122 | } else | |
123 | #endif | |
124 | { | |
125 | /* XXX: using gettimeofday leads to problems if the date | |
126 | changes, so it should be avoided. */ | |
127 | return get_clock_realtime(); | |
128 | } | |
129 | } | |
130 | #endif | |
db1a4972 | 131 | |
87ecb68b PB |
132 | void qemu_get_timer(QEMUFile *f, QEMUTimer *ts); |
133 | void qemu_put_timer(QEMUFile *f, QEMUTimer *ts); | |
134 | ||
135 | /* ptimer.c */ | |
136 | typedef struct ptimer_state ptimer_state; | |
137 | typedef void (*ptimer_cb)(void *opaque); | |
138 | ||
139 | ptimer_state *ptimer_init(QEMUBH *bh); | |
140 | void ptimer_set_period(ptimer_state *s, int64_t period); | |
141 | void ptimer_set_freq(ptimer_state *s, uint32_t freq); | |
142 | void ptimer_set_limit(ptimer_state *s, uint64_t limit, int reload); | |
143 | uint64_t ptimer_get_count(ptimer_state *s); | |
144 | void ptimer_set_count(ptimer_state *s, uint64_t count); | |
145 | void ptimer_run(ptimer_state *s, int oneshot); | |
146 | void ptimer_stop(ptimer_state *s); | |
147 | void qemu_put_ptimer(QEMUFile *f, ptimer_state *s); | |
148 | void qemu_get_ptimer(QEMUFile *f, ptimer_state *s); | |
149 | ||
29e922b6 BS |
150 | /* icount */ |
151 | int64_t qemu_icount_round(int64_t count); | |
152 | extern int64_t qemu_icount; | |
153 | extern int use_icount; | |
154 | extern int icount_time_shift; | |
155 | extern int64_t qemu_icount_bias; | |
156 | int64_t cpu_get_icount(void); | |
157 | ||
158 | /*******************************************/ | |
159 | /* host CPU ticks (if available) */ | |
160 | ||
161 | #if defined(_ARCH_PPC) | |
162 | ||
163 | static inline int64_t cpu_get_real_ticks(void) | |
164 | { | |
165 | int64_t retval; | |
166 | #ifdef _ARCH_PPC64 | |
167 | /* This reads timebase in one 64bit go and includes Cell workaround from: | |
168 | http://ozlabs.org/pipermail/linuxppc-dev/2006-October/027052.html | |
169 | */ | |
170 | __asm__ __volatile__ ("mftb %0\n\t" | |
171 | "cmpwi %0,0\n\t" | |
172 | "beq- $-8" | |
173 | : "=r" (retval)); | |
174 | #else | |
175 | /* http://ozlabs.org/pipermail/linuxppc-dev/1999-October/003889.html */ | |
176 | unsigned long junk; | |
4a9590f3 AG |
177 | __asm__ __volatile__ ("mfspr %1,269\n\t" /* mftbu */ |
178 | "mfspr %L0,268\n\t" /* mftb */ | |
179 | "mfspr %0,269\n\t" /* mftbu */ | |
29e922b6 BS |
180 | "cmpw %0,%1\n\t" |
181 | "bne $-16" | |
182 | : "=r" (retval), "=r" (junk)); | |
183 | #endif | |
184 | return retval; | |
185 | } | |
186 | ||
187 | #elif defined(__i386__) | |
188 | ||
189 | static inline int64_t cpu_get_real_ticks(void) | |
190 | { | |
191 | int64_t val; | |
192 | asm volatile ("rdtsc" : "=A" (val)); | |
193 | return val; | |
194 | } | |
195 | ||
196 | #elif defined(__x86_64__) | |
197 | ||
198 | static inline int64_t cpu_get_real_ticks(void) | |
199 | { | |
200 | uint32_t low,high; | |
201 | int64_t val; | |
202 | asm volatile("rdtsc" : "=a" (low), "=d" (high)); | |
203 | val = high; | |
204 | val <<= 32; | |
205 | val |= low; | |
206 | return val; | |
207 | } | |
208 | ||
209 | #elif defined(__hppa__) | |
210 | ||
211 | static inline int64_t cpu_get_real_ticks(void) | |
212 | { | |
213 | int val; | |
214 | asm volatile ("mfctl %%cr16, %0" : "=r"(val)); | |
215 | return val; | |
216 | } | |
217 | ||
218 | #elif defined(__ia64) | |
219 | ||
220 | static inline int64_t cpu_get_real_ticks(void) | |
221 | { | |
222 | int64_t val; | |
223 | asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory"); | |
224 | return val; | |
225 | } | |
226 | ||
227 | #elif defined(__s390__) | |
228 | ||
229 | static inline int64_t cpu_get_real_ticks(void) | |
230 | { | |
231 | int64_t val; | |
232 | asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc"); | |
233 | return val; | |
234 | } | |
235 | ||
236 | #elif defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__) | |
237 | ||
238 | static inline int64_t cpu_get_real_ticks (void) | |
239 | { | |
240 | #if defined(_LP64) | |
241 | uint64_t rval; | |
242 | asm volatile("rd %%tick,%0" : "=r"(rval)); | |
243 | return rval; | |
244 | #else | |
245 | union { | |
246 | uint64_t i64; | |
247 | struct { | |
248 | uint32_t high; | |
249 | uint32_t low; | |
250 | } i32; | |
251 | } rval; | |
252 | asm volatile("rd %%tick,%1; srlx %1,32,%0" | |
253 | : "=r"(rval.i32.high), "=r"(rval.i32.low)); | |
254 | return rval.i64; | |
255 | #endif | |
256 | } | |
257 | ||
258 | #elif defined(__mips__) && \ | |
259 | ((defined(__mips_isa_rev) && __mips_isa_rev >= 2) || defined(__linux__)) | |
260 | /* | |
261 | * binutils wants to use rdhwr only on mips32r2 | |
262 | * but as linux kernel emulate it, it's fine | |
263 | * to use it. | |
264 | * | |
265 | */ | |
266 | #define MIPS_RDHWR(rd, value) { \ | |
267 | __asm__ __volatile__ (".set push\n\t" \ | |
268 | ".set mips32r2\n\t" \ | |
269 | "rdhwr %0, "rd"\n\t" \ | |
270 | ".set pop" \ | |
271 | : "=r" (value)); \ | |
272 | } | |
273 | ||
274 | static inline int64_t cpu_get_real_ticks(void) | |
275 | { | |
276 | /* On kernels >= 2.6.25 rdhwr <reg>, $2 and $3 are emulated */ | |
277 | uint32_t count; | |
278 | static uint32_t cyc_per_count = 0; | |
279 | ||
280 | if (!cyc_per_count) { | |
281 | MIPS_RDHWR("$3", cyc_per_count); | |
282 | } | |
283 | ||
284 | MIPS_RDHWR("$2", count); | |
285 | return (int64_t)(count * cyc_per_count); | |
286 | } | |
287 | ||
14a6063a RH |
288 | #elif defined(__alpha__) |
289 | ||
290 | static inline int64_t cpu_get_real_ticks(void) | |
291 | { | |
292 | uint64_t cc; | |
293 | uint32_t cur, ofs; | |
294 | ||
295 | asm volatile("rpcc %0" : "=r"(cc)); | |
296 | cur = cc; | |
297 | ofs = cc >> 32; | |
298 | return cur - ofs; | |
299 | } | |
300 | ||
29e922b6 BS |
301 | #else |
302 | /* The host CPU doesn't have an easily accessible cycle counter. | |
303 | Just return a monotonically increasing value. This will be | |
304 | totally wrong, but hopefully better than nothing. */ | |
305 | static inline int64_t cpu_get_real_ticks (void) | |
306 | { | |
307 | static int64_t ticks = 0; | |
308 | return ticks++; | |
309 | } | |
310 | #endif | |
311 | ||
312 | #ifdef NEED_CPU_H | |
313 | /* Deterministic execution requires that IO only be performed on the last | |
314 | instruction of a TB so that interrupts take effect immediately. */ | |
315 | static inline int can_do_io(CPUState *env) | |
316 | { | |
317 | if (!use_icount) | |
318 | return 1; | |
319 | ||
320 | /* If not executing code then assume we are ok. */ | |
321 | if (!env->current_tb) | |
322 | return 1; | |
323 | ||
324 | return env->can_do_io != 0; | |
325 | } | |
326 | #endif | |
327 | ||
2d8ebcf9 RH |
328 | #ifdef CONFIG_PROFILER |
329 | static inline int64_t profile_getclock(void) | |
330 | { | |
331 | return cpu_get_real_ticks(); | |
332 | } | |
333 | ||
334 | extern int64_t qemu_time, qemu_time_start; | |
335 | extern int64_t tlb_flush_time; | |
336 | extern int64_t dev_time; | |
337 | #endif | |
338 | ||
87ecb68b | 339 | #endif |